High-efficiency derusting solution for steel derusting

Abstract

The invention discloses a high-efficiency derusting solution for steel derusting, which is prepared from the following raw materials: 15-20 parts of phosphoric acid, 10-12 parts of acetic acid, 8-10 parts of carboxylic acid, 5-7 parts of fatty acid, 3-5 parts of citric acid, 3-6 parts of cupric hydroxide, 4-6 parts of calcium carbonate, 3-5 parts of ammonia water, 5-8 parts of tartaric acid, 3-6 parts of activated carbon, 4-5 parts of ethanol, 6-8 parts of toluene, 5-8 parts of potassium chloride, 5-10 parts of sodium bicarbonate, 2-5 parts of ferric hydroxide, 3-5 parts of dimethyl carbonate, 3-6 parts of fatty alcohol polyethenoxy ether, 6-8 parts of potassium silicate and 50-55 parts of deionized water. The high-efficiency derusting solution for steel derusting has the advantages of simple and accessible raw materials and low cost; and when being used for steel derusting, the high-efficiency derusting solution for steel derusting is convenient to use and has high derusting speed, the derusted steel does not have the phenomenon of over corrosion and has smooth surface, and the mechanical strength is not lowered due to hydrogen brittleness.

Description

technical field [0001] The invention relates to the technical field of derusting liquid, in particular to an efficient derusting liquid for iron and steel derusting. Background technique [0002] At present, in order to improve the service life of steel and components, the cleaning and derusting of the steel surface must be carried out. Strong acid rust removal is a more common method at present, and the most commonly used sulfuric acid pickling process has many disadvantages. If heating is required to waste energy, produce acid mist and seriously pollute the environment, damage the health of workers, take a long time for sulfuric acid pickling, and cause over-corrosion and hydrogen embrittlement to steel and affect the mechanical strength of steel. In order to overcome the shortcomings of the sulfuric acid pickling process, in recent years, many studies have been devoted to the use of hydrochloric acid and different additives to prepare iron and steel rust removal solution...

AI Technical Summary

Problems solved by technology

There are many types of formulas used in existing derusting liquids, among which hexamethylenetetramine, sodium lauryl sulfate, dodecyldiethanolamide, etc. In the process, pickling produces too much foam, which not only reduces the effective volume of pickling but also increases the difficulty of operation